I'm confused and disappointed.Registered and paid for guild membership 6/2.Opted-in for presale code.Never received one.Emailed guild admin, no response.Was I not supposed to get a presale code or did I just get hosed?

Sorry to hear that. While it does sound like you got hosed I don't think that it was intentional. I did the same with the guild and opted-in for the pre-sale and I did receive a code. Hopefully they plan for small hiccups and can find a way to get you a reservation.